What motherboard?

2 x Radeon HD6970 (XFX) - GPU
P8P67 B3 - Motherboard
Intel Core i7 2600k @ 3.4Ghz - CPU
2 x 4GB Vengeance - RAM
Corsair TX850W - Power supply
Scythe Mugen 3 - CPU Cooler
2000GB 64MB SATA600 7200rpm - HDD
120GB Solid State Drive
Phantom NZXT - Case

And 3 x ProLite E2473HDS iiyama monitors



That is my current spec, now someone told my motherboard isn't the best to use XFX on, any ideas which would suite XFX better?

budget: Doesn't really matter, as long as its better for my XFX  

Thanks in advance